Clark isn't bad but he's not NFL material IMO where guys like Harmon and Damonic Williams are. I watched NC State vs Notre Dame and watched Clark on every play, just like I watched Michigan State and TCU's defense, and there's a difference in the talent level.
For example Harmon and Damonic are getting double teamed on every down, but they're still collapsing the pocket. Harmon has more power, Damonic has sick moves and better hands. Clark was getting swallowed up man to man against Notre Dame. NC State also rotated him out much more, and didn't play him on 3rd down while Michigan St and TCU kept their guys in all downs.
Clark isn't bad but he's not that level, JMO